The thesis I defend is, briefly stated, this: Our passional nature not only lawfully may, but must, decide an option between propositions, whenever it is a genuine option that cannot by its nature be decided on intellectual grounds; for to say, under such circumstances, ``Do not decide, but leave the question open," is itself a passional decision,--just like deciding yes or no,--and is attended with the same risk of losing the truth.

Given this claim, he argues religious belief can be reasonable. What is his argument? Is his argument sound?